Fuel tank flange structure

Abstract

The present invention relates to a tank flange structure, including an internal tank fixing flange, an external tank adjusting flange, mounting bolts and a sealing gasket, wherein the internal tank fixing flange contacts the sealing surface of the internal tank and is mounted on the tank wall of the external tank by mounting bolts, and the external tank adjusting flange is sleeved on the internal tank fixing flange; a first sealing gasket is arranged between the internal tank fixing flange and the sealing surface of the internal tank; a second sealing gasket is arranged between the external tank adjusting flange and the internal tank fixing flange. The present invention realizes the reliable installation of the dual structure of the internal and external tanks, solves the structural problem of using two or more insulating media in the tank, and can also be appropriately adjusted when the internal and external tank interfaces cannot be completely matched during the installation process, providing a direct operation interface for the lead-out of the components of the internal tank, and facilitating maintenance and inspection during long-term operation.

Description

Technical Field

[0001] The invention relates to a transformer oil tank, in particular to an oil tank embedded flange structure. Background Art

[0002] Transformers and reactors are important equipment for power transmission. Traditional designs generally have only one oil tank, with coils, body and other components placed inside the tank, and only one insulating medium is used for the internal components. However, when two or more insulating media are used for the internal components, the different properties of the insulating media cannot be mixed, so a dual structure design of inner and outer oil tanks must be adopted.

[0003] The current double structure of inner and outer oil tanks uses two or more insulating media, which leads to problems such as installation deviation, poor sealing, and easy oil leakage. Its sealing and strength performance cannot meet the requirements of current national standards and cannot guarantee safe and stable operation of the product. Summary of the invention

[0004] In view of the shortcomings of the existing technology of the double structure of inner and outer oil tanks, such as installation deviation, poor sealing, and easy oil leakage, the problem to be solved by the present invention is to provide an oil tank embedded flange structure that can ensure that the sealing surface of the external oil tank is in full contact with the adjusting flange and does not cause oil leakage.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] The present invention discloses an oil tank embedded flange structure, comprising an internal oil tank fixed flange, an external oil tank adjusting flange, mounting bolts and a sealing gasket, wherein the internal oil tank fixed flange contacts with a sealing surface of the internal oil tank and is mounted on the tank wall of the external oil tank by means of mounting bolts, and the external oil tank adjusting flange is sleeved on the internal oil tank fixed flange.

[0007] A first sealing gasket is provided between the internal oil tank fixing flange and the sealing surface of the internal oil tank 1 .

[0008] A second sealing gasket is arranged between the external oil tank adjusting flange and the internal oil tank fixing flange.

[0009] The external oil tank adjusting flange is fixedly connected to the external oil tank.

[0010] The present invention has the following beneficial effects and advantages:

[0011] 1. The present invention realizes the reliable installation of the dual structure of the internal and external oil tanks, solves the structural problem of using two or more insulating media in the oil tank, and can also make appropriate adjustments when the internal and external oil tank interfaces cannot be completely aligned during installation, providing a direct operation interface for the lead-out of the components of the internal oil tank, which is convenient for maintenance and inspection during long-term operation.

[0012] 2 The present invention is flexible and easy to install, and adopts a rigid flange sealing connection, which not only ensures that the internal and external oil tanks can withstand the strength requirements of national standards, but also ensures the sealing of the internal and external oil to prevent the risk of oil leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front view of the inner and outer oil tank installation structure of the present invention;

[0014] Figure 2 Based Figure 1 A top view of

[0015] Figure 3 for Figure 2 Enlarged schematic diagram of part I in the middle.

[0016] Among them, 1 is the internal oil tank, 2 is the external oil tank, 3 is the internal oil tank fixing flange, 4 is the external oil tank adjusting flange, 5 is the first sealing gasket, 6 is the mounting bolt, 7 is the second sealing gasket, 8 is the external oil tank wall, and 9 is the internal oil tank wall. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] like Figures 1-2 As shown, the present invention provides an oil tank embedded flange structure, comprising an internal oil tank fixing flange 3, an external oil tank adjusting flange 4, mounting bolts 6 and a sealing gasket 5, wherein the internal oil tank fixing flange 3 contacts the sealing surface of the internal oil tank 1, is mounted on the box wall of the external oil tank 2 by means of the mounting bolts 6, and the external oil tank adjusting flange 4 is mounted on the internal oil tank fixing flange 2.

[0019] like Figure 3 As shown, a first sealing gasket 5 is provided between the sealing surface of the internal oil tank fixing flange 3 and the internal oil tank 1 ; a second sealing gasket 7 is provided between the external oil tank adjusting flange 4 and the internal oil tank fixing flange 2 ; and the external oil tank adjusting flange 4 is fixedly connected to the external oil tank 2 .

[0020] The present invention makes the internal oil tank fixing flange 3 contact with the sealing surface of the internal oil tank 1 and is assembled with the mounting bolts 6, thereby ensuring that the opening of the internal oil tank can lead out the cable to connect with the external electrical components without the problem of oil leakage.

[0021] The external oil tank adjusting flange 4 is used when the internal oil tank 1 is installed in the external oil tank 2, and there will be a certain installation size deviation. At this time, the adjusting flange is used to adjust with the external oil tank and fixed by welding to ensure that the sealing surface of the external oil tank is in full contact with the adjusting flange and no oil leakage occurs.

[0022] like Figures 1-2As shown, when the internal oil tank 1 is placed in the external oil tank 2, the internal oil tank fixing flange 3 and the first sealing gasket 5 are installed first, and the internal oil tank fixing flange 2 is tightened to the box wall of the internal oil tank 1 by using the mounting bolts 6 to form a sealing surface of the internal oil tank 1.

[0023] like Figure 3 As shown, the external oil tank adjusting flange 4 is mounted on the internal oil tank fixing flange 2, and the second sealing gasket 7 is installed at the same time, and then the internal oil tank fixing flange 3 and the external oil tank adjusting flange 4 are welded together to form a sealing surface of the external oil tank 2.

[0024] Finally, the external oil tank adjusting flange 4 is welded to the external oil tank 2 to form a whole.

[0025] The present invention is mainly used for transformers and reactors with oil-immersed internal and external double oil tank structures. It is flexible and easy to install and adopts a rigid flange sealing connection, which not only ensures that the internal and external oil tanks can withstand the strength requirements of national standards, but also ensures the sealing of the internal and external oil to prevent the risk of oil leakage.

Claims

1. A fuel tank flange structure, characterized in that: It includes an internal oil tank fixing flange, an external oil tank adjusting flange, mounting bolts and a sealing gasket, wherein the internal oil tank fixing flange contacts the sealing surface of the internal oil tank and is mounted on the tank wall of the external oil tank through the mounting bolts, and the external oil tank adjusting flange is sleeved on the internal oil tank fixing flange; A first sealing gasket is provided between the internal oil tank fixing flange and the sealing surface of the internal oil tank 1; A second sealing gasket is provided between the external oil tank adjusting flange and the internal oil tank fixing flange; The external oil tank adjusting flange is fixedly connected to the external oil tank.

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